China + ESA + Max Planck Institute for Extraterrestrial Physics (MPE) + Centro Nacional de Estudios Espaciales (CNES) contributions
Pedantically, it's Einstein Probe (EP), not Einstein. Confusingly, in Chinese it has another name, Tianguan, commemorating the observation of the supernova which created the Crab Nebula.
This is not very newsworthy, stellar flares are common and known to emit X-rays.
If measured the way we measure solar flares (M1, X1 etc) what would this one be rated as?